Abstract
This paper presents a comprehensive review on subsea jet trenching technology via a critical analysis of its principle, mechanism, devices, modeling approaches, as well as properties of subsea sediments. This review shows that the success of jet trenching operations is closely related to some key factors including the soil conditions, trencher specifications, and characteristics of pipelines or cables. Three case histories are presented to demonstrate the importance of these key factors and their interrelationships. This paper also points out a number of challenges pertaining to the implementation of the jet trenching method in carbonate sediments, as well as some limitations and gaps in the existing modeling approaches. Future perspective researches that are recommended to develop: (1) promising theories, like turbulent submerged flow, and (2) robust numerical approaches, such as the smoothed particle hydrodynamics (SPH) and material point method (MPM) to substantiate the experimental experience and reveal possible hidden mechanisms.
Highlights
With the development of offshore systems, subsea cables and pipelines have become important communication channels through the maritime domain
The concept of subsea trenching has been developed over the years through the improvement of design and implementation techniques
It is acknowledged that when subsea cables are not properly protected, they can be damaged, due to the seabed relief [8], ship anchors [9,10,11], icebergs [12], industrial fishing activity [13], and even shipping containers that sporadically fall from vessels [10]
Summary
With the development of offshore systems (wind farm, oil, gas, etc.), subsea cables and pipelines have become important communication channels through the maritime domain. The demands for such channels keep increasing, and the needs for trenching operations have grown rapidly in recent years [1,2,3]. The concept of subsea trenching has been developed over the years through the improvement of design and implementation techniques. 2 of 27 2 of 29 dapmoargtieodn p(io.er.t,io1n8%(i).ew., a1s8%in)duwcaesdinindtuercnedalliynt[e1r4n]a. LlFyig[u1r4e].1Fpigruesreen1tsptrheesernetssultthseorfeasurletcseonft asurrevceeynton susrvuebymoanrinsuebcmabalreinfaeuclatsb,lewfhaiuchltsc,ownhfiircmh tchoenfhiramzarthdes hdauzeatrodtshdeueextteortnhael eaxgtgerrensaslioangsg[r1e5ss].ions [15]. FigFuigreur1e. 1E.xEtexrtneranlaalgaggrgersessisoionnfafauullttss on suubbsseeaaccaabblelessfofroarllawll awteartderepdtehpst(hasda(apdteadpftreodmfrKoomrdKahoiredtaahl.i[e1t5]). al. [15])
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